然而并不是。
宾语从句和定语从句都是即可少成分也可不少成分的。
如宾语从句:
I don't know whether he will come tomorrow。(whether后的句子不少成分)
I don't know what he talked about。(what后的句子少成分,也就是说what在从句中作talk about 的宾语)
定语从句:
I still remember the day that we spent together last summer。(that后的句子中spent少宾语,所以that指代the day 在从句中作宾语,可省略)
I still remember the day when we enjoyed ourselves lat summer。(when后的句子不少成分。)
至于连接词和关系词怎么填,有疑问的话请追问。
追问那在请问 怎么区分那些是宾从 哪些是定从 哪些是主从
追答就是看从句在主句中充当什么成分,在主句中作宾语就是宾从,做主语就是主从,作定语就是定从,定从去掉是不影响句子的语法表达的。
如:
(What is important) is that you know my feelings . 宾语从句
I don't know (whether he will come or not tomorrow). 主语从句
I still remember the day (that we spent together last summer). 定语从句